Ion-conducting membrane for fuel cell

Details Ion-conducting membrane for fuel cell Ion-conducting membrane for fuel cell

C - Chemistry, Metallurgy

08

F

C08F 8/36 (2006.01) C08C 19/20 (2006.01) C08F 8/04 (2006.01) C08J 5/22 (2006.01) C08L 19/00 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2337860

Ion-conducting membranes for fuel cells are disclosed. The membrane is composed of a hydrogenated and sulfonated statistical copolymer of styrene and butadiene. A preferred membrane is obtained by hydrogenating a copolymer of styrene and butadiene to obtain less than five percent residual unsaturation, then sulfonating the polymer with an acetyl sulfate sulfonation agent to a level of at least 30 mo1 percent sulfonate.

On décrit une membrane conductrice d'ions pour pile à combustible. La membrane est composée d'un copolymère statistique hydrogéné et sulfoné de styrène et de butadiène. On produit une membrane préférée en hydrogénant un copolymère de styrène et de butadiène pour obtenir une insaturation résiduelle inférieure à cinq pour cent. On procède ensuite à la sulfonation du polymère au moyen d'un agent de sulfonation de sulfate d'acétyle, à un niveau d'au moins 30 moles pour cent de sulfonate.

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